辽宁阜新乌兰木头盆地义县组地质特征及火山构造  

GEOLOGICAL CHARACTERISTICS AND VOLCANIC STRUCTURES OF EARLY CRETACEOUS YIXIAN FORMATION IN ULANMUTOU BASIN, LIAONING PROVINCE

作　　者：潘玉启 佟国元 王烜 吴子杰 程培起 陈佩佩 李红梅 

机构地区：[1]辽宁省地质勘查院,辽宁大连116100 [2]辽宁省核工业地质局二四一大队,辽宁丹东118100

出　　处：《地质与资源》2014年第A01期27-34,共8页Geology and Resources

基　　金：辽宁省勘查基金项目(编号200809005)资助

摘　　要：阜新北部乌兰木头盆地早白垩世义县组火山岩为贫稀土钾质钙碱性系列岩石,具有中性→酸性演化特征.火山岩为处于拉张条件下断陷盆地内的火山喷发产物,岩浆来源于地壳.火山机体构造为破火山,具多口中心式喷发的特点.火山喷发韵律明显,喷发活动由强→弱.古火山活动恢复划分出5个发展演化阶段.The volcanic rocks of Early Cretaceous Yixian Formation in the Ulanmutou basin in northern Fuxin,Liaoning province belong to poor-REE potassic calc-alkali series,with an evolution from intermediate to acidic.The rocks are products of volcanic eruption in tensional condition in fault-depression basins.The magma is derived from the crust.The volcanic apparatus is caldera,with the characteristics of central eruption.The eruption is in an obvious rhythm from strong to weak.The ancient volcanic activities are divided into five evolution stages.

关 键 词：义县组 断陷盆地 破火山 演化阶段 阜新北部 辽宁 

分 类 号：P588.14[天文地球—岩石学] P542.3[天文地球—地质学]